The storms are causing lots of problems, but also lots of beauty. This scene is along the Sweetbriar Road between Route 9 and Cave Neck Road.
According to records I’ve seen since a previous blog about blizzards, it looks like the big blizzard I remember in Delaware’s Cape Region, prior to this week’s events, was on President’s Day weekend in 1979. The big freeze must have been in the winter of 1977-78. It’s hard to believe that 30 years have passed since those events. The state did a good job clearing the roads back then but not as good as with this storm.
The next largest storm I remember was a blizzard that rolled across Delmarva in 1958. I was eight at the time and living in Chestertown, Md. That storm took out lots of telephone and electric poles and there were huge drifts across the countryside. Families moved in with families. People made do.
It’s amazing how many of these major storms have come in the middle of February.
I found some statistical information on mid-Atlantic blizzards on Jeff Masters’ blog at WunderGround.com. Masters is one of the founders of WunderGround, a great site for weather and all its related topics. For anyone interested in global warming and strong discussions about it. Masters is passionate and learned on the subject and very scientific with his approach and sources. His current blog, for example, explains why the dramatic weather events we’re having are not inconsistent with global warming claims. If you, like me, are confused by all of the global warming information, but vitally interested, Masters’ blogs will interest you. All of the storms I mentioned are in these lists somewhere. Take a look.
Here’s some of what Masters wrote in the current blog:
Updated: 5:23 PM GMT on February 08, 2010
A major new winter storm is headed east over the U.S. today, and threatens to dump a foot or more of snow on Philadelphia, New York City, and surrounding regions Tuesday and Wednesday. Philadelphia is still digging out from its second top-ten snowstorm of recorded history to hit the city this winter, and the streets are going to begin looking like canyons if this week’s snowstorm adds a significant amount of snow to the incredible 28.5″ that fell during “Snowmageddon” last Friday and Saturday. Philadelphia has had two snowstorms exceeding 23″ this winter. According to the National Climatic Data Center, the return period for a 22+ inch snow storm is once every 100 years–and we’ve had two 100-year snow storms in Philadelphia this winter. It is true that if the winter pattern of jet stream location, sea surface temperatures, etc, are suitable for a 100-year storm to form, that will increase the chances for a second such storm to occur that same year, and thus the odds have having two 100-year storms the same year are not 1 in 10,000. Still, the two huge snowstorms this winter in the Mid-Atlantic are definitely a very rare event one should see only once every few hundred years, and is something that has not occurred since modern records began in 1870. The situation is similar for Baltimore and Washington D.C. According to the National Climatic Data Center, the expected return period in the Washington D.C./Baltimore region for snowstorms with more than 16 inches of snow is about once every 25 years. This one-two punch of two major Nor’easters in one winter with 16+ inches of snow is unprecedented in the historical record for the region, which goes back to the late 1800s.
Top 9 snowstorms on record for Philadelphia:
1. 30.7″, Jan 7-8, 1996
2. 28.5″, Feb 5-6, 2010 (Snowmageddon)
3. 23.2″, Dec 19-20, 2009 (Snowpocalypse)
4. 21.3″, Feb 11-12, 1983
5. 21.0″, Dec 25-26, 1909
6. 19.4″, Apr 3-4, 1915
7. 18.9″, Feb 12-14, 1899
8. 16.7″, Jan 22-24, 1935
9. 15.1″, Feb 28-Mar 1, 1941
The top 10 snowstorms on record for Baltimore:
1. 28.2″, Feb 15-18, 2003
2. 26.5″, Jan 27-29, 1922
3. 24.8″, Feb 5-6, 2010 (Snowmageddon)
4. 22.8″, Feb 11-12, 1983
5. 22.5″, Jan 7-8, 1996
6. 22.0″, Mar 29-30, 1942
7. 21.4″, Feb 11-14, 1899
8. 21.0″, Dec 19-20, 2009 (Snowpocalypse)
9. 20.0″, Feb 18-19, 1979
10. 16.0″, Mar 15-18, 1892
The top 10 snowstorms on record for Washington, D.C.:
1. 28.0″, Jan 27-28, 1922
2. 20.5″, Feb 11-13, 1899
3. 18.7″, Feb 18-19, 1979
4. 17.8″ Feb 5-6, 2010 (Snowmageddon)
5. 17.1″, Jan 6-8, 1996
6. 16.7″, Feb 15-18, 2003
7. 16.6″, Feb 11-12, 1983
8. 16.4″, Dec 19-20, 2009 (Snowpocalypse)
9. 14.4″, Feb 15-16, 1958
10. 14.4″, Feb 7, 1936
Heavy snow events–a contradiction to global warming theory?
Global warming skeptics regularly have a field day whenever a record snow storm pounds the U.S., claiming that such events are inconsistent with a globe that is warming. If the globe is warming, there should, on average, be fewer days when it snows, and thus fewer snow storms. However, it is possible that if climate change is simultaneously causing an increase in ratio of snowstorms with very heavy snow to storms with ordinary amounts of snow, we could actually see an increase in very heavy snowstorms in some portions of the world. There is evidence that this is happening for winter storms in the Northeast U.S.–the mighty Nor’easters like the “Snowmageddon” storm of February 5-6 and “Snowpocalypse” of December 19, 2009. Let’s take a look at the evidence. There are two requirements for a record snow storm:
1) A near-record amount of moisture in the air (or a very slow moving storm).
2) Temperatures cold enough for snow.
It’s not hard at all to get temperatures cold enough for snow in a world experiencing global warming. According to the 2007 Intergovernmental Panel on Climate Change (IPCC) report, the globe warmed 0.74°C (1.3°F) over the past 100 years. There will still be colder than average winters in a world that is experiencing warming, with plenty of opportunities for snow. The more difficult ingredient for producing a record snowstorm is the requirement of near-record levels of moisture. Global warming theory predicts that global precipitation will increase, and that heavy precipitation events–the ones most likely to cause flash flooding–will also increase. This occurs because as the climate warms, evaporation of moisture from the oceans increases, resulting in more water vapor in the air. According to the 2007 Intergovernmental Panel on Climate Change (IPCC) report, water vapor in the global atmosphere has increased by about 5% over the 20th century, and 4% since 1970. This extra moisture in the air will tend to produce heavier snowstorms, assuming it is cold enough to snow. Groisman et al. (2004) found a 14% increase in heavy (top 5%) and 20% increase in very heavy (top 1%) precipitation events in the U.S. over the past 100 years, though mainly in spring and summer. However, the authors did find a significant increase in winter heavy precipitation events have occurred in the Northeast U.S. This was echoed by Changnon et al. (2006), who found, “The temporal distribution of snowstorms exhibited wide fluctuations during 1901-2000, with downward 100-yr trends in the lower Midwest, South, and West Coast. Upward trends occurred in the upper Midwest, East, and Northeast, and the national trend for 1901-2000 was upward, corresponding to trends in strong cyclonic activity.”
Here’s the link to the full text and art of the Masters blog referenced here.
http://www.wunderground.com/blog/JeffMasters/article.html
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